potts



. 2 SheetsSheet 2. J. G. POTTS.

LOOM SCROLL.

(No Model.)

Patented Oct. 28, 1884.

WITN

the scroll detached from each other.

the mann er in which the scrolls are used.

. Unrrnn STaTns PATTJNT Omaha.

JOSEPH O. POTTS, OF BERW'YN, PENNSYLVANIA, ASSIG'NOR TO HIMSELF AND JOSEPH H. OOATES, OF SAME PLACE.

LOOlVh-SCROLL.

SPECIFICATION forming part of Le ters Patent No. 307A09, dated October 28. 1884-.

Application filed December 14, 1883. (No model.)

To (tZZ whom at 177.0, concern.-

Be it known that I, J osErH O. Por'rs, a citizen of the United States, residing in Berwyn, Chester county, Pennsylvania, have invented certain Improvements in Loom-Scrolls, of which the following is a specification.

The object of my invention is to construct a loom-scroll which can be readily changed to vary the shift of the same by simply rearranging the parts of the scroll on the shaft; and this object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure 1, Sheet 1, is a longitudinal section of a loom, showing the parts to which my invention relates; Fig. 2, a plan view of the cams, scrolls, and treadles of the loom; Figs. 3 and 4, Sheet 2, views of my improved scroll, and Fig. 5 a perspective view of the parts of Part of the cam-shaft of the loom is also shown in Figs. 2, 3, 4, and 5.

In Fig. 1, A represents one of the frames of the loom; B, the crank-shaft; D, the camshaft geared thereto by spur-wheels a a; and E, cams acting on shoes on the treadles F, which are connected as usual to the suspended heddles Z). Each cam E is secured to a scroll, G, which is keyed to the cam-shaft D and engages with a pivoted shoe, (Z, on the fixed bar e of the loom, as shown in Fig. 2. This is the on dinary arrangement, the scrolls shown being ordinary two'shift scrolls cast in one piece, these views being shown simply to illustrate As the cam-shaft rotates each cam is laterally shifted, owing to the engagement of the shoe (1 with the scroll-groove, the cam acting first on the outside treadle and then 011 the one adjacent to it. In some looms a greater number of treadles are used than shown in Fig. 2, and it is desirable to vary the shift of the scrolls, so that each cam may act upon two, three, four, or more of the treadles. To accomplish this the scrolls have been halved longitudinally, so that they could be readily applied to or removed from the shaft, a different scroll being used for each shift; but the main objection to this plan is that a number of extra half scrolls or shells must be kept on hand in order to render the full capacity of the loom available. Moreover, the scrolls or shells which are not in use are liable to be mislaid, so that when wanted they are not at hand, and much time is lost in changing the loom. l overcome this objection by making a scroll of a series of rings which are furnished with ribs of such a character that when the rings are fitted together in the proper re lation to each other a scroll-groove will be formed.

In the drawings I have shown a scroll comprising four rings, ff and g g, and two end disks, h h, this scroll being capable of adj ustment so as to form either a two-shift, athreeshift, or a four-shift scroll. Thus, as shown in Fig. 3, the rings are adjusted to form a fourshift scroll, the rings 9 g being clamped between the end rings, f f and the ribs i of all of the rings, serving to form the four communicating grooves 1 2 3 4 and the cross-groove 5. It will be observed that each ring does not carry a complete scroll-rib, the tail of each ribthat is to say, the portion forming one boundary of the groove 5-being formed on the ring adjacent to that which carries the main portion of the rib.

As shown in Fig. 4, the parts are adjusted to form a two-shift scroll, the end rings, ff, being brought together, and the rings {1 g placed outside of the disk h, and if it is desired to form a three-shift scroll one of the rings y will be clamped between the end rings,

, ff, the other ring, g, being left outside of the disk 71.. All of the rings and disks have keyseats for the reception of a key, 8, on the shaft D, and the rings 9 and one of the end rings, f, are free to slide on the shaft D, but cannot be removed therefrom, the other end ring, f, however, being made in halves, so that it can be removed from the shaft to permit the sliding of the rings gthcreon, and then reapplied to the shaft after the said rings 9 have been properly adjusted. The halves of the ring f are connected by a dovetailed joint, to prevent separation of the same when the rings are bolted together. The end disk, h, is also halved, so as to be adjustable with the ring f and form a proper backing therefor, or the end disks, h 71/, may, if desired, form. part of roo the end rings, ff. The rings and disks are held together by bolts m and nuts '12 the bolts being adapted to openings 1) in the disks h h the scroll are held together by the bolts m whether the change-rings g are in use or not,

so that the loss of any of the parts of the scroll is unlikely, and the changing of the scroll from one shift to another can be effected in a may be used, however, as the desired extreme shift of the scroll may suggest.

I claim as my invention- 1. A loom-scroll comprising outer rings, f f, and one or more intermediate or change rings, said rings having ribs '5, adapted to form the scroll-slot, and means for securing the rings together, as set forth.

2. The combination of the ringsf, f, and 9, having ribs adapted to form a scroll-slot, as described, with the clamping-bolts m and nuts n, as specified.

3. The combination of the shaft D, the end ring, f, and intermediate ring or rings, 9, with the end ring, f, made in halves, and with means for securing the rings together, as set forth.

4. The combination of the shaft D and its key 8, the rings f and 9, having key-seats and openings the end ring, f, having elongated 45 key seat 3 and segmental slots 15, and the clamping-bolts m and nuts n, as set forth.

In testimony whereof Ihavesigned my name to this specification in the presence of two subscribing witnesses.

J OS. 0. POTTS. Witnesses:

JOHN E. PARKER, HARRY SMITH. 

